v3dv: Move V3D_TFU_READAHEAD_SIZE to src/broadcom/common

We will use it in v3d.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36159>

src/broadcom/common/v3d_device_info.h

@@ -71,6 +71,11 @@ struct v3d_device_info {
         uint32_t cle_buffer_min_size;
 };
 
+/* TFU has a 64-bytes readhead. To avoid the unit reading unmaped memory
+ * we need to overallocate buffers that could be read by the TFU.
+ */
+#define V3D_TFU_READAHEAD_SIZE 64
+
 typedef int (*v3d_ioctl_fun)(int fd, unsigned long request, void *arg);
 
 bool

src/broadcom/vulkan/v3dv_device.c

@@ -2183,7 +2183,7 @@ v3dv_AllocateMemory(VkDevice _device,
    assert(pAllocateInfo->sType == VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO);
 
    /* We always allocate device memory in multiples of a page, so round up
-    * requested size to that. We need to add a V3D_TFU_READHAEAD padding to
+    * requested size to that. We need to add a V3D_TFU_READAHEAD padding to
     * avoid invalid reads done by the TFU unit after the end of the last page
     * allocated.
     */

src/broadcom/vulkan/v3dv_private.h

@@ -598,11 +598,6 @@ struct v3dv_device {
    struct util_dynarray device_address_bo_list; /* Array of struct v3dv_bo * */
 };
 
-/* TFU has readhead of 64 bytes. So to avoid the unit reading unmaped memory
- * it is needed to overallocate buffers that could be read by the TFU
- */
-#define V3D_TFU_READAHEAD_SIZE 64
-
 struct v3dv_device_memory {
    struct vk_device_memory vk;